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7 functions implement hook_field_is_empty() in Drupal 7

Note: this list is generated by pattern matching, so it may include some functions that are not actually implementations of this hook.

field_test_field_is_empty in modules/field/tests/field_test.field.inc
Implements hook_field_is_empty().
file_field_is_empty in modules/file/file.field.inc
Implements hook_field_is_empty().
image_field_is_empty in modules/image/image.field.inc
Implements hook_field_is_empty().
list_field_is_empty in modules/field/modules/list/list.module
Implements hook_field_is_empty().
number_field_is_empty in modules/field/modules/number/number.module
Implements hook_field_is_empty().
taxonomy_field_is_empty in modules/taxonomy/taxonomy.module
Implements hook_field_is_empty().
text_field_is_empty in modules/field/modules/text/text.module
Implements hook_field_is_empty().